Mummy-style sleeping bag



FIG. 1 is a front view of a sleeping bag, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view of a second embodiment of the sleeping bag, showing an expanded lower portion; and,

FIG. 8 is a rear view of FIG. 7.

The broken lines in FIGS. 1, 6 and 7, circumscribing the hood opening and bottom opening, represent the portions of the sleeping bag, which form no part of the claim design. The remaining broken lines, shown throughout the views, represent stitching, which forms no part of the claim design. 

The ornamental design for a sleeping bag, substantially as shown and described. 